The crystal growth and dissolution of barium sulfate in the presence of additives

Liu, Sung-Tsuen; Nancollas, G.H.

doi:10.1016/0021-9797(75)90284-2

Cited by 61 publications

(29 citation statements)

References 28 publications

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“…2H20 in the presence of phosphonates, polyphosphonates, and other polyelectrolytes (17,18). It is also interesting to note that seeded growth of BaS04 in the presence of trace amount of sodium tripolyphosphate, Liu and Nancollas (19) found that crystallization reaction following the initial induction period takes place at a rate comparable to the rate of crystallization from pure solution.…”

Section: Resultsmentioning

confidence: 93%

Kinetics of crystal growth of calcium sulfate dihydrate. The influence of polymer composition, molecular weight, and solution pH

Amjad¹

1988

Can. J. Chem.

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A seeded crystal growth technique has been used to study the influence of solution pH and temperature ranging from 25 to 50°C on the performance of polymers of varying functional groups as calcium sulfate dihydrate (CaS04.2H20, gypsum) crystal growth inhibitors. Results indicate that at constant temperature and at a constant solution pH, crystallization in the presence of polyacrylic acids is preceded by an initial slow growth reaction, hcreaftcr called induction period, following which crystal growth of gypsum proceeds with a rate close to that in pure supersaturated solution. Results suggest that at a constant pH, polyacrylic acid concentration, molecular weight, and temperature greatly affect the duration of induction period. Kinetic data collected as a function of solution pH in the range 2.5 to 9.0 suggest that solution pH has a marked effect on the induction period. The observed dependence of induction period on solution pH may be explained in terms of the degree of ionization of polyacrylic acid. Among the polymers of varying functional groups studied, i.e. carboxyl, sulfonate, acrylamide, dimethyldiallylammonium, etc., only those polymers having carboxyl group showed marked inhibitory activity for the growth of gypsum crystals.ZAHID AMJAD. Can. J . Chem. 66, 1529 (1988) On a fait appel i une technique de croissance de cristaux ensemencCs pour Ctudier I'influence du pH de la solution ainsi que de la tempkrature (allant de 25 i 50°C) sur la performance de polymkres portant divers groupements fonctionnels comme inhibiteurs de la croissance de cristaux du sulfate de calcium dihydratC (&SO4. 2H20, gypse). Les rCsultats indiquent que, i tempCrature constante et i un pH de solution constant, la cristallisation en prCsence d'acides polyacryliques est prCcCdCe par une rCaction initiale de croissance qui est lente, appelCe par la suite pCriode d'induction, et qui est suivie par une croissanee du cristal de gypse se produisant i une vitesse qui est proche de celle qui est observie avec une solution sursaturke pure. Les rCsultats suggerent que, i des pH constants, la concentration en acide polyacrylique, le poids molCculaire et la tempirature influencent beaucoup la pCriode d'induction. Les donnCes cinCtiques recueillies en fonction du pH allant de 2,5 2 9,O suggtrent que le pH de la solution a une influence marquCe sur la pCriode d'induction. On peut expliquer cette observation en fonction du degri d'ionisation de I'acide polyacrylique. Parmi les polymeres portant divers groupements fonctionnels, eomme carboxyle, sulfonate, acrylamide, dirnithyldiallylammonium, etc, seuls les polymeres portant des groupements carbonyles prisentent une activitC inhibitrice marquee sur la croissance des cristaux de gypse.[Traduit par la revue]

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Section: Resultsmentioning

confidence: 93%

Kinetics of crystal growth of calcium sulfate dihydrate. The influence of polymer composition, molecular weight, and solution pH

Amjad¹

1988

Can. J. Chem.

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“…Usually, strong inhibiting effects are observed only in the presence of chelating organic molecules, at levels of $ 4 Â 10 À8 M upwards (e.g. Liu and Nancollas, 1975;Rizkalla, 1983). Our experiments were carried out in the absence of organic additives and Ra concentrations were always very low (between 10 À9 M and 5 Â 10 À8 M at the start of the tests).…”

Section: Ra-barite Solid Solutionsmentioning

confidence: 99%

Radium uptake during barite recrystallization at 23±2°C as a function of solution composition: An experimental 133Ba and 226Ra tracer study

Curti

Fujiwara

Iijima

et al. 2010

Geochimica et Cosmochimica Acta

126

169

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“…There have been many studies on the effect of impurities on both barite and calcite precipitation (for example [15][16][17][18][19][20]). As shown in [20], there is a large variety of morphologies that can be obtained even with one class of organic additive.…”

Section: Introductionmentioning

confidence: 99%

The interaction of EDTA with barium sulfate

Jones

Ogden

et al. 2007

Journal of Colloid and Interface Science

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Ethylenediaminetetraacetic acid (EDTA) is a known complexing agent that interacts with a host of cations. In this paper, various techniques are used to elucidate the mechanism of interaction between EDTA and barium sulfate surfaces. It is shown that complexation with metal ions is not sufficient to explain the inhibition of barite crystallization but that other processes such as chemisorption must also occur. EDTA is shown to always adsorb as the mono-protonated species - suggesting that the molecule is able to lose a proton when it adsorbs at lower pH. Molecular modelling shows that the interaction of the surface barium ions with the carboxylate group is an important one. Finally, in situ turbidity measurements provide information about the mechanism of nucleation/growth modification. It is found that the EDTA molecule inhibits barium sulfate nucleation and that this could be its primary means of inhibiting precipitation of barium sulfate.

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The crystal growth and dissolution of barium sulfate in the presence of additives

Cited by 61 publications

References 28 publications

Kinetics of crystal growth of calcium sulfate dihydrate. The influence of polymer composition, molecular weight, and solution pH

Kinetics of crystal growth of calcium sulfate dihydrate. The influence of polymer composition, molecular weight, and solution pH

Radium uptake during barite recrystallization at 23±2°C as a function of solution composition: An experimental 133Ba and 226Ra tracer study

The interaction of EDTA with barium sulfate

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